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OLIVER E. PILLARD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR 'TO FREDERIC'- II. NORTH, OF THE SAME PLACE.

Letters .Patent No. 73,831, dated January 28, 1868.

IMPI?.OVEMEN'I' IN PEEMUTATION-LOGKS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, OLIVER E. PILLARD, of New Britain, in the county of Hartford, and State of Connecticut, have invented, made, and applied to use a certain new and useful Improvement in Locks; and I do hereby declare the following to be a full, clear, and exact description of thesaid invention, reference being had to the annexed drawing, making part of this specification, wherein i' l Figure 1 is an elevation of the lock, the cap-plate being removed `and the bolt projected.

Figure 2 is a similar view, with the boltwretracted. the circular tumblers in these two figures being removed, and their` position shown byrred lines; and

Figure Sis a vertical section through the spindle of the lock.

v Similar marksoi' reference denote the same parte.

My invention applies to that class of locks in which a series of circular tumblers are used, that are set successively by the action of a knob andspindle, that, when turned to certain index-points, allow the bolt to bc retracted. i

The object of my invention is not to provide for setting the tumblers and for moving the bolts by therotation oi the same 'spindle and knob, but to cut oi communication between the knob and tumblers when the bolt is retracted, thereby preventing the tumblers becoming misplaced, and to cut otf any action of the spindle on the bolt, when projected, until the whole of the tuniblers are properly placed; thereby it is impossible to avail of any uiovenientgiven to the bolt in finding out the positions in which the tumblers have to be placed previous to opening the lock, because the bolt and the tumblers cannot be simultaneously acted upon.-

The natu-re of my said invention consists in a ring, suspended from the dog, which is so positioned that the hub of the spindle can be drawn into said ring when the dogdrops, thereby preventing the spindle being drawn back to act onthe bolt until the position of the tumblers has been determined, to allow the dog to drop, and when the bolt has been retracted, a plate thereon coming at the edge of the spindle-hub prevents the hub being pushed into Contact with the tumblers untilthe bolt is again projected. I also provide n. spiral range of holes around the spindle, whereby the knob may be placed at whatever point is required to accommodate the thickness of the door'. v

In the drawing, a represents the door, and b the lock-case; c, the cap, as usual. d is the spindle; e, the

ltnob, with the circular base to the knob, with index-marks. f is the circular langed base, into which the base of the knob e enters. The spindle c2 has a hub, y, on its inner end, from which projects an arm, 2, to act upon the talon 'of thc bolt L; and said hub g has also a pin, 3, to act upon the circular tumblers 7c c, upon the stud Z, to set themv so that their notches will receive the arm 4- of the dog z'. These tumblers, and their mode of seta ting, being ofthe usual character, do not require further description; The dog t' is upon a fnlcrum-pin, 5, and thc ond, G, of said. dog z', is an are'oi` a circle from said pin 5, and takes against 4the stud 7 on the bolt la.' When said bolt is projected, the are of-a circle on said end'oi` the dog prevents any variation in-the amountot' end play to the bolt, if 'said dog is in a more or less elevated position. From the dog z', a pin, 8, projects, that susponds the ring o, that has a hole inI it justilargeenough for the hub g to pass into it, and this can only be done when thc.ring is lowered to the proper position bythe dog e' dropping, as in tig. 2. A plate or projecting lip is formed upon the lower vedge of the bolt-shank :1t 9, and this is notched (at 1U) at a point opposite to the hub, when the bolt is projected, as seen in iig. I. l

When the parts are in thepositions shown in gs. 2 andB, the bolt may be projected or retracted. When retracted, the lip or plate 9 prevents the spindle being pushed in to act on the tumblers; but when the bolt is projected, the notch :1t 10 allows the spindle to be pushed in to act on the tumblers; VThe turning ci' the ill-st tnmblcr (hy :in inclined side of its notch) raises thedog z', with the ring, and said ring o prevents the spindle being drawn hack, for its arm 2 to act on the bolt 71.. until the tumblels are all properly placed'for their notches to allow the dog 2' to fall, and lower the ring 0. Y

I make the spindle Z with a spiral row of. holes, as eeen at m, to receive the screw-pin y, that passes tu'ouqf 4 the sleeve of thc knob c, so that the distance between the knob and lock-case can be aried, as necessary, for tting diicrent thicknesses of doors.

The same operation of stopping the end-motion of. the shaft by the ring 0 may be e'ected with only a. soc'- tion of a. ring, or by a. blocking-piece lifted by the dog, to prevent the spindle or shaft being drawn back'i'nto contact with the bolt until the dog drops. I

What I claim, and desire to secure by Letters Patent, is

L The ring or blockingpiece suspended from the dog z', in combination with the hub g and arm 2 on the spindle d, as and for the purposes set forth. I l

2. The plate or lip 9, in combination with the hub g, ring o, a'ndbolt'L, as andl for the purposes set. forth'.

3. The combination of the ring o, dog z', bolt h, hub g, lip 9, und circular turblei's k c, as and for the pui'- poses set forth.

4. The combination of the bolt h and hub g with the plate or iiange 9, that is notched, -to allow the hub g to be moved, to connect with the tumblers when the boltiis projected, but prevents the tumblers being acted on, when the bolt is retracted, suhstantiolly'ns set forth.

In witness whereof, I have hereunto set my signature, this 13th day of July, 1867.

' OLIVER' E. PILLARD.

Witnesses i.

Cms. H. SMITH, Geo. D. WALKER. 

